diff options
| -rw-r--r-- | block.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/block.c b/block.c index 67ae35a47a..4752feee4e 100644 --- a/block.c +++ b/block.c @@ -201,6 +201,13 @@ int bdrv_set_read_only(BlockDriverState *bs, bool read_only, Error **errp) return -EINVAL; } + /* Do not clear read_only if it is prohibited */ + if (!read_only && !(bs->open_flags & BDRV_O_ALLOW_RDWR)) { + error_setg(errp, "Node '%s' is read only", + bdrv_get_device_or_node_name(bs)); + return -EPERM; + } + bs->read_only = read_only; return 0; } |